72191080 has 32 divisors (see below), whose sum is σ = 174925800. Its totient is φ = 26654976.

The previous prime is 72191057. The next prime is 72191101. The reversal of 72191080 is 8019127.

It can be written as a sum of positive squares in 4 ways, for example, as 38713284 + 33477796 = 6222^2 + 5786^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68895 + ... + 69934.

Almost surely, 2^72191080 is an apocalyptic number.

It is an amenable number.

72191080 is an abundant number, since it is smaller than the sum of its proper divisors (102734720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72191080 is a wasteful number, since it uses less digits than its factorization.

72191080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138853 (or 138849 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 72191080 is about 8496.5334107505. The cubic root of 72191080 is about 416.3844602839.

The spelling of 72191080 in words is "seventy-two million, one hundred ninety-one thousand, eighty".